# ONE Engine Email Verify Basic

> ONE Engine Email Verify Basic is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0024/call, status unknown (last checked 2026-10-02).

Validates an email address for syntax correctness, MX record existence, disposable domain detection, and role-based address identification

## Facts

- Endpoint: POST https://one-search.one-engine.workers.dev/v1/email/verify?utm_source=zero.xyz
- Price: $0.0024/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/one-engine-email-verify-basic-fdbf5df4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G8S9mFQMwqJ_Tx1bY_pOP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability one-engine-email-verify-basic-fdbf5df4 -d '<json body>'
```

Example prompt: Can you validate the email address 'john.doe@example.com' and tell me if it has valid syntax, a real MX record, and whether it looks like a disposable or role-based address?

## When to prefer this

Choose this endpoint when you need a lightweight, low-cost email pre-screening at sign-up, lead capture, or list import time — especially when you want syntax, MX, disposable-domain, and role-address checks in a single call without the latency or cost of a full SMTP probe. Ideal for autonomous agents that need to filter obvious junk emails cheaply before investing in deeper verification.

## Known failure modes

- Missing or empty email field returns an error
- Malformed request body causes a 400-level response
- MX lookup may fail for obscure TLDs or newly registered domains
- Disposable domain list may not include the very latest throwaway providers
- Network timeout on upstream DNS resolution for MX checks

## How this service works

Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.

## Output

Returns a JSON object containing the original email, an overall risk level (e.g. 'low'), individual boolean check results for syntax validity, MX record presence, disposable domain detection, and role-based local part detection, plus a scope note clarifying that no SMTP mailbox existence check is performed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to validate"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "risk": "low",
  "email": "user@example.com",
  "scope": "Syntax, MX and basic domain heuristics only. No SMTP mailbox existence check.",
  "checks": {
   "mx_found": true,
   "syntax_valid": true,
   "disposable_domain": false,
   "role_based_local_part": false
  },
  "product": "email_verify_basic"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/one-engine-email-verify-basic-fdbf5df4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from one-search.one-engine.workers.dev](https://www.zero.xyz/host/one-search.one-engine.workers.dev/llms.txt)